Ffmpeg kostya

Opened 7 years ago.

ffmpeg kostya

Closed 3 years ago. The ProRes? The output quicktime has some artifacts in the gray square see attachment zoomed part of image - out. Download all attachments as:. I can't attach test. But same problem with attached test. Is the problem also reproducible for you with the following command line? I have created bit TIF from 8-bit and it works, no artifacts!!!

So JPEG encoding test is usefull Oh no, the result is still not correct! The gray square is now OK, but there are new artifacts in the brown square :. Definitely it is not a problem with color space conversion. It seems that it completely ignores -b parameter I see artifacts in the output video when using YUVP10 directly in my program I've tried h. Replying to rivierakid :. That is because you have not compiled your local copy of x with bit encoding support.

Testing with test. But I don't know how to control quality in "prores"? I'm not interested in encoding to v codec, you did not give command output. I'm interested in encoding from v to prores. Not only LT, HQ and probably other profiles are broken too. Not sure if it's broken only for You originally wrote 'Same artifacts as in "prores"' Since I see several statements that possibly contradict each-other, please try to clarify which command lines allow you to reproduce the problem and which work fine.

If possible, do not try to involve x, it is a lossy codec and may affect your test results. That was not for format, but I've made many tests and you're right that it's little bit unclear :. Reproducing problem: test. That was not for format, but I've made many test and you're right that it's little bit unclear :.

With -v debug I notice several "Unknown or unsupported tagBy using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. The dark mode beta is finally here. Change your preferences any time.

ffmpeg kostya

Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. I'm learining NReco wrapper for ffmpeg, and trying to implement "damage" filter to audio like in this video. I have an audio file, and a "filter", then they should be merged to the finalised 3rd audio file. I think that I should use ffmpeg parameters in this way:. And second part is how to chage volume of the "filter" and loop it throught main audio file duration before merging.

I'm not sure if ffmpeg has it's own filter-like method, so any proposals are welcomed. Learn more. Overlaying two audio files with ffmpeg in C Ask Question. Asked 3 years, 10 months ago. Active 3 years, 7 months ago. Viewed times. I think that I should use ffmpeg parameters in this way: ffmpeg -i main. Thanks in advance. Kostya Pysarchuk Kostya Pysarchuk 11 6 6 bronze badges. Active Oldest Votes. FFMpegConverter ; ffMpeg. Invoke command.

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Question feed. Stack Overflow works best with JavaScript enabled.For several months I downloaded source snapshots at cybercafe even dial-up was impossible then. In order to test it I wrote a decoder and hacked it into FFmpeg.

Eventually it worked and I send my decoder to Mike Melanson. On the 14th of August it was committed to FFmpeg codebase and it made me proud for my work for a week those were the times! I think I started submitting my patches there with Indeo2 decoder or so. As you may know, most active group of developers had disagreements on how FFmpeg was managed.

First that resulted into an attempt to move old-style development elsewhere and reinstating new development under old name. Since Fabrice was in favour of old group and controls ffmpeg.

But what is the root of disagreements? At least since when I joined the project FFmpeg was rather a self-organizing community of developers, each with his own goals. Somebody wanted to play movie trailers encoded with QuickTime hi there, Mike! Bug tracking system was set up by Luca and he also found a hosting for it. A lot of services for FFmpeg were run on hardware of Attila Kinali and even bandwidth and hosting for main server was his achievement.

Almost every significant action was done by somebody else. Were they following some roadmap devised by him? There is no such thing either. Wrong again, he caused some people to leave project and not only the last year, Baptiste would serve good example and different service maintainers too — by forcing his idiosyncrasies on project like long-standing DTS guessing issue or ordering service maintainers around.

And his role as lead developer has been diminishing probably since But what does he do in recent time? Thus, some developers had had enough and forked. This fork seems to moved murky waters and some trolls mostly from MPlayer project that have no relation to FFmpeg at all reappeared after long time; I cannot directly blame Michael on it but it seems suspicious for me. You can follow any responses to this entry through the RSS 2.

Both comments and pings are currently closed. Well, for me the experience in the short time was that patch review times are abysmal as ever and review quality lower. I never was, nor wanted to be a legendary leader. What one of my main goals was and is, is not to be in peoples way when they want to work on something. And yes ive surely contributed less in the months prior to the fork than i did years before. That was to a some extend due to some people fillibustering my work wherever they could and thus making it quite non-fun.

The libmpcodecs case is an example. These people left now to libav with several other people that i would really have preferred if they did not leave, but when they are happier there it cant be a bad thing. But time will tell that. And i want to use this opertunity to say, that you kostya are always welcome to return to ffmpeg, if you want with your own tree, branch or fork where you are the final boss.

About your list of work done by people, its true but one sided, you only list the people who now are on the libav side. Carl and many others did insane amounts of patch monkying and there where several people who put quite some effort into keeping the ftp clean. But the main thing i really did and still do in ffmpeg is reviewing patches. I havnt done any statistics but iam pretty sure ive reviewed more patches than all members of libav added together.

And where i failed to do it, often noone else did either, and that was true for more than just gsoc patches. Todays reviews in ffmpeg still are pretty much what they always where, the people who understand a patch and have time and will, do a review.Some people wanted to have ProRes encoder in Libav so I wrote one. And from what I gather it even has one user not me. In default mode of operation encoder has to honour frame constraints i. Feel free to leave wishes for features in comments, hopefully I can implement it when I have time.

For proper profile support we need bit YUV with alpha. This entry was posted on Monday, March 19th, at pm and is filed under Uncategorized. You can follow any responses to this entry through the RSS 2. Both comments and pings are currently closed. Is this a large or small undertaking? Has this been on the wishlist for a long time? Is it likely to happen in the near future i.

For someone not familiar with the libav codebase, what source files would need to be touched to enable this? I use the prores feature in libav now! So, I am a second user, and thank you very much. I record content in Huffyuv and convert it to Prores for our video editor to utilize in Final Cut Pro. An error is given upon import, but the video is functional in Final Cut. I have come to understand that the encoding is also limited to a single thread.

Hopefully multi-threading will come sometime. Am I missing something? Sorry about that! Just trying to figure out how to use it with … ffmpeg does have yuvp10 now… or does this work with now?

libavcodec/proresenc_kostya.c

However I can scrub through the movies fine, or even frame-step through the entire thing with no problems. Doing video only seems to work flawlessly! Thanks so much for this. I work with footage that was shot on Red so I want to keep the bit depth as high as possible.

If someone could please help me with this it would really be apprciated. If I can get this working on Windows reliably it will be massive help.

Стабилизация Даши с помошью FFmpeg

First, question regarding -vendor flag. Have I misunderstood what -vendor flag does or….? Second question I have — interlaced ProRes.DCPs or Digital Cinema Packages are a fairly specialised form of distributing films and video for digital cinema. The emphasis of this format is on high-resolution, and high-quality — supporting up to 4k films encoded using the JPEG codec. In the vast majority of cases you would want to take your finished film, and convert it TO a DCP for distribution to cinemas, film festivals and so on.

Converting a DCP to a more common video format, such as Quicktime ProRes, is a very simply one-step process, but it involves some navigating of DCP folders and crazy filenames. A typical DCP folder will usually contain files that look something like this:. The beautiful thing about ffmpeg is that we now no longer need to worry about what those formats are, or indeed what colourspace the source material is in.

So ffmpeg fills in the gaps, and applies a colour conversion. Clever, huh? The aim is primarily to convert the DCP to a format that most editing systems will understand.

The other main caveat with this method is the conversion process, particularly the colourspace part, is fairly rough. A better choice would be ProReswhich is capable of storing bit RGB colour values at full resolution. While the file sizes would be larger than the ProRes format, you would still benefit from the flexibility and editing performance you get from the ProRes codec. Alternatively, if you want to stick with ProRes but would prefer to use a specific ProRes profile i. Another valuable use case for this procedure is in the creation of lower quality viewing copies, rather than high-quality intermediates for editing.

Both of the above examples assume stereo is good enough for PC viewing, but there are plenty of examples out there to help you with advanced audio manipulation. This article is part of the ffmpeg tutorial series.

FFmpeg / Libav Summer Of Code

Great article Oliver, got me out of a sticky situation today! How would I opt out of the colour conversion? Jho glad the info was useful to you. As for creating a QuickTime. By default ffmpeg gives the highest available quality, which with a DCP as the source is chroma subsampling, but some pc-based players may not support it. Running the conversion on an Interop DCP, I found that centre channel content was being output on the left surround channel. To investigate this further I downloaded a Dolby 5.

ffmpeg kostya

Beware that although this clip is a DCP for testing 5. This approach does result in any other audio channels present in the stream simply being discarded. So, my command line for converting the Dolby 5. I have tested the above technique on a number of unencrypted trailer DCPs, and it seems to work fine. Hi William, thanks for your comments. In my specific case, the aim was retain as much of the original image fidelity, but also allow a workflow that fit with our existing editing tools to allow us to create clips, nomination reels and award ceremony AV sequences for our festivals.

Hence the choice of ProRes. Thanks for sharing. We have had trouble before now with mis-matched audio channels, and this would well have been the culprit. I have to cut a trailer out of some french DCPs and therefor to convert the mxf-files. I wonder if it is a problem with my source files, because third-party decoder which eventually base on ffmpeg has the same result.

Could that mean, that they use jpeg with rgb colour space instead of xyz colour space? Is that possible? And: do you have any suggestions, what i can do to get a useable file for cutting?FFmpeg added support for ProRes in october — which made my life a little easier. The added support for ProRes closed a big gap for me as I quite often get exports in ProRes and need to transcode it into something more lossy like H. Update: It was later renamed to version 2.

This is a VBR encoding method. If bitrate is not specified, the bitrate will be automatically chosen based on video resolution and will be similar to the reference encoder for the same profile. Thanks for the info on the profiles Liam! Just a minor spelling mistake: It is -profile:v 0. That is not the FFmpeg version but your Ubuntu version. You need a newer version of FFmpeg. The build has to be from at leastbut a fresh build is better since there has been improvements recently.

Ok Thanks so much for your advice, I ll check that right now and install the latest ffmpeg build! Please use avconv instead. Update your Libav version to the newest one from Git. If the problem still occurs, it means that your file has a feature which has not been implemented. Thank you very much, this opened my eye to that there is a very competent free option available for converting MTS2 to Prores.

Also HQ is much higher than the specifications. Did you notice anything strange on this topic yet? Maybe the profiles map is not accurate? Thanks for the info! Thanks, Frederik. Too specific, maybe. Thanks for that link; exactly what I needed.

Pingback: FFmpeg for video encoding. Is it possible to encode to ProRes XQ? Well FFmpeg supports alpha channel, so give the following a try: ffmpeg -i input. Thanks you so much for the speedy reply. I will certainly give that a try and pass your tip along to the other members of the team.

Thank you for all the tips! The files do not have audio. Thank you for the fast answer! But now I saw that the ordinal file is BT. Does it do a color conversation? Well, what is your input codec — something using ?

Regarding BT. Thanks again for your help and the link! I tried it with a H. Both p BT. Both end up as BT.Publish Date : Last Update Date : View User Comments Add Comment. There are not any metasploit modules related to this CVE entry Please visit www. How does it work? Use of this information constitutes acceptance for use in an AS IS condition.

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FFmpeg / Libav Summer Of Code

CVSS Score 7. Partial There is considerable informational disclosure. Partial Modification of some system files or information is possible, but the attacker does not have control over what can be modified, or the scope of what the attacker can affect is limited. Partial There is reduced performance or interruptions in resource availability. Low Specialized access conditions or extenuating circumstances do not exist. Very little knowledge or skill is required to exploit.

Not required Authentication is not required to exploit the vulnerability.


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